Rena's date with Yui is interrupted by a mysterious person from her past.

As Empress, Yui is forced to choose who she will protect. More strangers appear seeking the Regalia.

Alecto is confronted by a new potential threat. Yui visits the festival, while Rena prepares a surprise for Yui.

Yui and Rena's relationship is tested when they encounter a visitor from Rimgarde.

Yui has devised a plan to deal with the threat from Abel, and along with Rena, they must find the strength to see it through.

Yui, Rena, Tia, and Sara are summoned to another country by an unknown Regalia. Meanwhile, Johann grows restless.